That was the intent. We were created by the greatest Genius mankind had ever known. We brought peace and compliance in our wake, and we almost had the greatest peace that was ever known.

Almost. Chaos infiltrated our ranks and turned some of us traitor, slaves to old gods that the new light of secularism had mostly burned away. My Warmaster, my Primarch, Horus, fell in battle, then rose up again to challenge the Emperor. I stood against him, and paid the ultimate price.